The 2009 model would be the best model. It has rainsense and AFM. The 2011 is the same engine as the 2009 except now the 2011 can reverse in EV mode. I like the 2009 because of the 3.4 final drive ratio which is good for acceleration and towing. They are both rated at 8100 lbs like the regular gas models. The 2011 is not flex fuel according to a GM engineer I know but if the 2011 has a yellow gas cap then it's flex fuel. Even though you might not want to use E90, the fuel line of a flex fuel is more corrosion resistant than a non flex fuel. But not sure if the 2011 is flex fuel. The 2009 has a nav disk while the 2011 is hard drive. My nav was replaced under warranty at 90k miles because the disc was taking time to read. The hybrids have 8 years 100k mile warranty on hybrid components not the nav. A cheaper priced hybrid would be my choice and it gives you room for expense. The battery should last 300k miles.